Note 12 - Fair Value Measurements and Derivatives - Fair Value Measurements on a Recurring Basis (Details) - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member]
Derivative assets	$ 5	$ 1
Derivative liabilities	5	1
Interest Rate Contract [Member]
Derivative liabilities	9	3
Cash Flow Hedging [Member] | Foreign Exchange Forward [Member]
Derivative assets	3	14
Derivative liabilities	8	2
Cash Flow Hedging [Member] | Currency Swap [Member]
Derivative liabilities	62	71
Marketable Securities [Member] | Certificates of Deposit [Member]
Certificates of deposit	$ 22	$ 19